<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			function foo(e)
			{
				console.log(e)
				
				if(e.ctrlKey&&e.shiftKey&&e.altKey)
				{
					alert("你同时按住了alt shift ctrl")
				}
				
			}
			document.onkeydown=foo;
			
			
			
		</script>
	</body>
</html>
